DDNS
Technology & Computing abbreviation · Networking
| Stands for | Dynamic DNS |
|---|---|
| Categories | Technology & Computing |
DDNS stands for Dynamic DNS, a networking abbreviation.
Automatically updates a DNS record whenever a network's public IP address changes, so a fixed hostname always points to a home or small-office connection even though the ISP reassigns its address. Routers, NAS boxes and security cameras often include a DDNS client.
Example: Set up DDNS on the router so the security cameras stay reachable after the ISP changes our address.
Usage notes
The standard mechanism for changing records programmatically, DNS UPDATE, is defined in RFC 2136 (1997), though consumer services usually rely on simple HTTP calls instead. DDNS cannot help behind carrier-grade NAT, because the public address is shared with other customers. Despite the similar letters, it has nothing to do with DDoS attacks.
Related abbreviations
More networking abbreviations
- CGNAT – Carrier-grade NAT
- CIDR – Classless Inter-Domain Routing
- CIFS – Common Internet File System
- CNAME – Canonical name (record)
- CRC – Cyclic redundancy check
- CSMA/CD – Carrier-sense multiple access with collision detection
- DHCP – Dynamic Host Configuration Protocol
- DMZ – Demilitarized zone
- DNS – Domain Name System
- DNSSEC – Domain Name System Security Extensions
- DoH – DNS over HTTPS
- DoT – DNS over TLS